LaPolt is as well regarded for protecting the interests of her superstar clients — Britney Spears, Fifth Harmony, Steven Tyler and deadmau5, among others — as she is for her ardent activism, recently filing suit on behalf of Songwriters of North America against the Department of Justice over its revamp of song licensing rules. “My claims are, the DOJ is violating the Constitution by taking [away] our due process of law, our personal property,” says the parent of 4-year-old twins. “Copyrights are our property.”